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Submission #261461

# Submission time Handle Problem Language Result Execution time Memory
261461 2020-08-11T18:19:27 Z EJOI2019Andrew Awesome Arrowland Adventure (eJOI19_adventure) C++14
100 / 100
 135 ms 21500 KB 
#include<bits/stdc++.h>
using namespace std;
typedef pair<int,int> ii;
typedef vector<int>vi;
typedef vector<ii> vii;
vector<vii> vec;
vi dist;
priority_queue<ii,vii,greater<ii>> pq;
#define INF 1000000007
void dijkstra(int s)
{
pq.push(ii(0,s));
dist[s]=0;
while(!pq.empty())
{
ii fr=pq.top();
pq.pop();
int w=fr.first;
int u=fr.second;
if(w>dist[u])
continue;
for(int i=0; i<vec[u].size(); ++i)
{
ii v=vec[u][i];
if(dist[u]+v.second<dist[v.first])
{
dist[v.first]=dist[u]+v.second;
pq.push(ii(dist[v.first],v.first));
}
}
}
}
int cost(char a,char b)
{
int aa,bb;
if(a=='E')
aa=1;
else if(a=='S')
aa=2;
else if(a=='W')
aa=3;
else
aa=4;
if(b=='E')
bb=1;
else if(b=='S')
bb=2;
else if(b=='W')
bb=3;
else
bb=4;
if(aa<=bb)
return bb-aa;
return 4-aa+bb;
}
int main()
{
int n,m;
cin>>n>>m;
char arr[n][m];
for(int i=0; i<n; ++i)
for(int j=0; j<m; ++j)
cin>>arr[i][j];
vec.assign(n*m+1,vii());
dist.assign(n*m+1,INF);
for(int i=0; i<n; ++i)
{
for(int j=0; j<m; ++j)
{
if(arr[i][j]!='X')
{
if(i-1>=0&&((arr[i-1][j]=='X'&&i-1==n-1&&j==m-1)||arr[i][j]!='X'))
vec[i*m+j].push_back(ii((i-1)*m+j,cost(arr[i][j],'N')));
if(i+1<n&&((arr[i-1][j]=='X'&&i-1==n-1&&j==m-1)||arr[i][j]!='X'))
vec[i*m+j].push_back(ii((i+1)*m+j,cost(arr[i][j],'S')));
if(j-1>=0&&((arr[i-1][j]=='X'&&i-1==n-1&&j==m-1)||arr[i][j]!='X'))
vec[i*m+j].push_back(ii(i*m+j-1,cost(arr[i][j],'W')));
if(j+1<m&&((arr[i-1][j]=='X'&&i-1==n-1&&j==m-1)||arr[i][j]!='X'))
vec[i*m+j].push_back(ii(i*m+j+1,cost(arr[i][j],'E')));
}
}
}
dijkstra(0);
if(dist[n*m-1]==INF)
cout<<-1;
else
cout<<dist[n*m-1];
}

Compilation message

adventure.cpp: In function 'void dijkstra(int)':
adventure.cpp:22:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 for(int i=0; i<vec[u].size(); ++i)
              ~^~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 368 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 368 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 288 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 256 KB Output is correct

Subtask #5
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 368 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 288 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 0 ms 256 KB Output is correct
22 Correct 1 ms 256 KB Output is correct
23 Correct 0 ms 256 KB Output is correct
24 Correct 1 ms 256 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 1 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 256 KB Output is correct
35 Correct 10 ms 1920 KB Output is correct
36 Correct 1 ms 512 KB Output is correct
37 Correct 12 ms 2048 KB Output is correct
38 Correct 11 ms 3072 KB Output is correct
39 Correct 119 ms 17144 KB Output is correct
40 Correct 114 ms 17016 KB Output is correct
41 Correct 65 ms 17016 KB Output is correct
42 Correct 117 ms 17144 KB Output is correct
43 Correct 135 ms 21500 KB Output is correct
44 Correct 65 ms 17016 KB Output is correct